MESON Chess Problem Database

Problem Display
PID: 207503 (8/B5bb/8/1N6/2pp1Q2/1p1k4/8/3K2n1 w - - 0 1)

Votruba, Otakar

Wiener Salonblatt, 1872

8/B5bb/8/1N6/2pp1Q2/1p1k4/8/3K2n1

#2

4 + 7

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Bh6
      • 2.Qxd4#
    • 1...Bf8
      • 2.Qxd4#
    • 1...Be4
      • 2.Qd2#
    • 1...Se2
      • 2.Qf3#
    • 1...Sf3
      • 2.Qxf3#
    • 1...Sh3
      • 2.Qf3#
  • Tries
    • 1.Sd6?
      • threat
        • 2.Qd2#
      • 1...Kc3
        • 2.Qd2#
      • 1...Bh6
        • 2.Qxd4#
      • 1...Sf3
        • 2.Qxf3#
      • 1...c3!
    • 1.Qg3+?
      • 1...Sf3
        • 2.Qxf3#
      • 1...Ke4!
  • Keys
    • 1.Sc3!
      • threat
        • 2.Qd2#
      • 1...Kxc3
        • 2.Qd2#
      • 1...dxc3
        • 2.Qe3#
      • 1...Bh6
        • 2.Qxd4#
      • 1...Sf3
        • 2.Qxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 4
  • Sets
    • B(f);N_GUARD::QAR1(B),XP(e)
    • B(g);SBLOCK::QAR1(B)
    • S(a);N_GUARD::QAR2(B)
    • S(a);N_GUARD::QAR2(B),XS(a)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAR1(B)
      • Vars
        • K(c);P-FLIGHT::QAB1(B)
        • B(f);N_GUARD::QAR1(B),XP(e)
        • S(a);N_GUARD::QAR2(B),XS(a)
      • Refutation
        • P(d);
    • Try
      • Q(B);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR2(B),XS(a)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • S(C);
    • Threat
      • QAR1(B)
    • Vars
      • K(c);P-FLIGHT,XS(C)::QAB1(B)
      • P(e);N_GUARD,SBLOCK,XS(C)::QAR1(B)
      • B(f);N_GUARD::QAR1(B),XP(e)
      • S(a);N_GUARD::QAR2(B),XS(a)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).